static void
emit_texblend(struct i830_context *i830, GLuint unit, GLuint blendUnit,
bool last_stage)
{
struct gl_texture_unit *texUnit = &i830->intel.ctx.Texture.Unit[unit];
GLuint tmp[I830_TEXBLEND_SIZE], tmp_sz;
if (0)
fprintf(stderr, "%s unit %d\n", __func__, unit);
/* Update i830->state.TexBlend
*/
tmp_sz = i830SetTexEnvCombine(i830, texUnit->_CurrentCombine, blendUnit,
GetTexelOp(unit), tmp, texUnit->EnvColor);
if (last_stage)
tmp[0] |= TEXOP_LAST_STAGE;
if (tmp_sz != i830->state.TexBlendWordsUsed[blendUnit] ||
memcmp(tmp, i830->state.TexBlend[blendUnit],
tmp_sz * sizeof(GLuint))) {
I830_STATECHANGE(i830, I830_UPLOAD_TEXBLEND(blendUnit));
memcpy(i830->state.TexBlend[blendUnit], tmp, tmp_sz * sizeof(GLuint));
i830->state.TexBlendWordsUsed[blendUnit] = tmp_sz;
}
I830_ACTIVESTATE(i830, I830_UPLOAD_TEXBLEND(blendUnit), true);
}
/* Installs a one-stage passthrough texture blend pipeline. Is there
* more that can be done to turn off texturing?
*/
static void set_no_texture( i830ContextPtr i830 )
{
static const struct gl_tex_env_combine_state comb = {
GL_NONE, GL_NONE,
{ GL_TEXTURE, 0, 0, }, { GL_TEXTURE, 0, 0, },
{ GL_SRC_COLOR, 0, 0 }, { GL_SRC_ALPHA, 0, 0 },
0, 0, 0, 0
};
i830->meta.TexBlendWordsUsed[0] =
i830SetTexEnvCombine( i830, & comb, 0, TEXBLENDARG_TEXEL0,
i830->meta.TexBlend[0], NULL);
i830->meta.TexBlend[0][0] |= TEXOP_LAST_STAGE;
i830->meta.emitted &= ~I830_UPLOAD_TEXBLEND(0);
}
/* Set up a single element blend stage for 'replace' texturing with no
* funny ops.
*/
static void enable_texture_blend_replace( i830ContextPtr i830 )
{
static const struct gl_tex_env_combine_state comb = {
GL_REPLACE, GL_REPLACE,
{ GL_TEXTURE, GL_TEXTURE, GL_TEXTURE }, { GL_TEXTURE, GL_TEXTURE, GL_TEXTURE, },
{ GL_SRC_COLOR, GL_SRC_COLOR, GL_SRC_COLOR }, { GL_SRC_ALPHA, GL_SRC_ALPHA, GL_SRC_ALPHA },
0, 0, 1, 1
};
i830->meta.TexBlendWordsUsed[0] =
i830SetTexEnvCombine( i830, & comb, 0, TEXBLENDARG_TEXEL0,
i830->meta.TexBlend[0], NULL);
i830->meta.TexBlend[0][0] |= TEXOP_LAST_STAGE;
i830->meta.emitted &= ~I830_UPLOAD_TEXBLEND(0);
/* fprintf(stderr, "%s: TexBlendWordsUsed[0]: %d\n", */
/* __FUNCTION__, i830->meta.TexBlendWordsUsed[0]); */
}
